A CMOS inverter circuit is coupled to a power source by a cut-off circuit which prevents current flow through the CMOS inverter circuit when the input signal to the CMOS inverter is of a first bi-level state. The cut-off circuit responds to the output signal from a second inverter circuit that is connected...http://www.google.de/patents/US4825106?utm_source=gb-gplus-sharePatent US4825106 - MOS no-leak circuit
